Results 111 to 120 of about 79,295 (351)

Aquitardifer: A New Hydrogeologic Term for Geologic Materials with both Aquitard and Aquifer Properties

open access: yesGroundwater, EarlyView.
Abstract We propose that a new term, aquitardifer, be added to the hydrogeologic nomenclature. Aquitardifer, a blend of the terms aquitard and aquifer, accounts for geologic materials that have properties of both as traditionally defined. Several examples of aquitardifers are provided, as is justification for and applicability of the term.
Anthony C. Runkel, Jessica R. Meyer
wiley   +1 more source

Subdivision of river channel sand micro-scale facies with feature attention spatio-temporal network

open access: yesFrontiers in Earth Science
IntroductionSedimentary micro-scale facies research is essential for characterizing the lateral and vertical evolutionary patterns and contact relationships within sedimentary facies.
Ruipu Zhao   +3 more
doaj   +1 more source

Geochemical reactivity of subsurface sediments as potential buffer to anthropogenic inputs: a strategy for regional characterization in the Netherlands [PDF]

open access: yes, 2011
Geochemical reactivity of subsurface sediments as potential buffer to anthropogenic inputs: a strategy for regional characterization in the ...
Gaans, P.F.M., van   +3 more
core   +3 more sources

The Geology of Aquitards in Alluvial Aquifers: A Predictive Approach Based on Facies Models

open access: yesGroundwater, EarlyView.
We review facies models for alluvial aquifers and demonstrate how they can be used to predict aquifer and aquitard continuity in three dimensions. We provide case studies illustrating how facies models can be used to improve groundwater investigation and remediation outcomes.
Michael R. Shultz, Colin Plank
wiley   +1 more source

Changxing Formation biohermal gas pools and natural gas exploration, Sichuan Basin, China

open access: yesPetroleum Exploration and Development, 2008
: Plain fluvial facies, paralic facies, shallow gentle slope facies on carbonate platforms, platform marginal reef facies, Kailiang trench facies, and north Sichuan western Hubei ocean basin facies are developed in the Permian Changxing Formation and ...
Zong-qing CHEN
doaj   +1 more source

Survey of the diagenesis process and effect these process on reservoir quality of the Kangan formation in South Pars Field [PDF]

open access: yes, 2009
Kangan and Upper Dalan formations are forming reservoir sequence of the South Pars field. Litology of the kangan formation is carbonate and (limestone and dolomite with anhydrite intervals), so digenetic processes were very active in this formation and ...
Ashkan Asadi Esksndar   +3 more
core   +1 more source

Interplay Between Mechanical and Petrochemical Models on the Fluid Extraction From Subduction Zones

open access: yesJournal of Metamorphic Geology, EarlyView.
ABSTRACT The breakdown of hydrous minerals during subduction results in a densification of the rocks, producing volume changes that can trigger fluid pressure fluctuations and hydrofracturing. These volume changes are controlled by the Clapeyron slope of the reaction and are quantified here using a macroscopic framework that integrates a zero ...
Thorsten Andreas Markmann   +1 more
wiley   +1 more source

Chemical Discrimination of Rutile From Different Metamorphic Source Rocks: Dealing With Hierarchical Data Structures in Random Forest Classification

open access: yesJournal of Metamorphic Geology, EarlyView.
ABSTRACT Rutile provides a wealth of petrochronological information in metamorphic geology and due to its high stability during processes of the sedimentary cycle, rutile takes a special position in sedimentary provenance analysis. Besides being one of the classical minerals datable using the U–Pb system, rutile incorporates a broad range of trace ...
Jan Schönig   +9 more
wiley   +1 more source

Sedimentary evolution and petroleum geological significance of Permian Maokou Formation in eastern and northern Sichuan Basin

open access: yesShiyou shiyan dizhi
In recent years, the Permian Maokou Formation of the Sichuan Basin shifted focus. Previously, targeting high points and exploring along the long axis were common.
Hua CAO   +11 more
doaj   +1 more source

Geochemical and ecological aspects of lower Frasnian pyrite-ammonoid level at Kostomłoty (Holy Cross Mountains, Poland) [PDF]

open access: yes, 2004
The lower Frasnian (transitans Zone with Ancyrodella priamosica = MN 4 Zone) rhythmic basin succession of marly limestones and shales (upper Szydlówek Beds) at Kostomloty, western Holy CrossMts., Central Poland, contains a record of the transgressive ...
Bond, D.P.G.   +3 more
core  

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